I'm currently validating a User Name input and I have to validate that certain special characters are allowed to be inserted into the input. This allowed all special characters. Share. Regular Expression (Regex) to exclude (not allow) Special Characters in JavaScript. Regex to allow just letters and special characters - Stack ... Regex for Password. Restricting Special Characters Regular expressions (also known as regex ) are powerful string processing tools (including text, numbers and special characters) which allow you to match, capture and even modify different fragments of any given string matching a pattern. - / in phone, fax, mobile field. If we take that approach, you can simply do . Inside the Validate JavaScript function, the value of the TextBox is tested against the Regular Expression Alphabets and Numbers (AlphaNumeric) characters with Space. Regex to accept alphanumeric and some special character in ... regular-expression. Salesforce: Regex allow only Numbers and Special Character. To test if a string meets some pattern, use Regex.IsMatch: Indicates whether the regular expression finds a match in the input string. Each expression can contain characters, metacharacters, operators, tokens, and flags that specify patterns to match in str. User-1760637409 posted Hi Friend, You can try the below example which is validate Numbers & special . java - Regex pattern including all special characters ... Regular Expression to allow specific special characters. User-1760637409 posted Hi Friend, You can try the below example which is validate Numbers & special . Improve this question. If you need to allow specific special characters, simply include them in the character class: "^[a-zA-Z\-]+$" Some special characters need to be escaped, some don't. But if you want to accept every character except numeric characters, it might be simpler to simply use: "^\D+$" . Is it possible to specify more than one regular expression? Regular Expression (Regex) to exclude (not allow) Special Characters in JavaScript. I have a Javascript regex like this: /^[\x00-\x7F]*$/ I want to modify this regex so that it accept all capital and non-capital alphabets, all the numbers and some special characters: - , _, @, .. Ask Question Asked 6 years, 5 months ago. All you have to do is escape characters that represent special functions in regex expressions like $^() - When the Button is clicked, the Validate JavaScript function is called. [A-Za-z0-9@!#$% &*()_+-=//.,";:{}|.etc etc] for example, is so ugly but it works to exclude spaces from a password validation while allowing other special characters, letters, and numbers. [A-Za-z0-9@!#$% &*()_+-=//.,";:{}|.etc etc] for example, is so ugly but it works to exclude spaces from a password validation while allowing other special characters, letters, and numbers. There are special characters that are sued to match multiple characters, match whitespace, match digits, match letters, etc. A pattern consists of operators, constructs literal characters, and meta-characters, which have special meaning. regular-expression. Follow asked Sep 12 '17 at 19:46. + - Almost the same behavior as * - the preceding character/group is matched . any character except newline \w \d \s: word, digit, whitespace \W \D \S: not word, digit, whitespace [abc] any of a, b, or c [^abc] not a, b, or c [a-g] character between a & g: Anchors ^abc$ start / end of the string \b: word boundary: Escaped characters \. I have not been successful in finding a way to neaten it up to [A-Za . To accept any string value that doesnt contains the five characters, you can use Don't hard code in regex like a-zA-Z0-9 because a string may contain other languages characters too. Requirement: to allow only numbers, space, and special characters + ( ) . User-740766282 posted Hi I am using following regex to not allow special characters ([a-z]|[A-Z]|[0-9]|[ ]|[-]|[_])* Now , i want to allow some special characters . When the Button is clicked, the Validate JavaScript function is called. regex for alphanumeric and alphabets regex for alphanumeric and specail characters regex to include alphanumeric regex to check alphabets in a alphanumeric and special character string regexpress alphanumeric regex to allow only alphanumeric only use alpha-numeric characters regex regex from alphanumeric compulsory 4 alphanumeric characters . 237 1 1 gold badge 2 2 silver badges 8 8 bronze badges. Prabhu Prabhu. Because of this flexibility, user can enter any data and cause the data become dirty. Share. A list of some of the more frequently used special characters are shown below: * - The preceding character/group is matched 0 or more times. How to validate password in alphanumeric format with one numeric and one special character at minimum.in ASP.NET with C#? Separate jquery regex for alphanumeric characters, 1 uppercase and 1 lowercase, 1 special characters. \* \\ escaped special characters \t \n \r: tab, linefeed, carriage . That would make it easier by far. regex for alphanumeric and alphabets regex for alphanumeric and specail characters regex to include alphanumeric regex to check alphabets in a alphanumeric and special character string regexpress alphanumeric regex to allow only alphanumeric only use alpha-numeric characters regex regex from alphanumeric compulsory 4 alphanumeric characters . Any help is appreciated. Regex for Alphanumeric and Special characters with limit. Wondering if there is a clean way to do this where you could use \W instead of spelling out every one of the allowed special characters. Because of this flexibility, user can enter any data and cause the data become dirty. A pattern consists of operators, constructs literal characters, and meta-characters, which have special meaning. How to validate password in alphanumeric format with one numeric and one special character at minimum.in ASP.NET with C#? Like Germany, Urdu, Chinese .. so that does not contain characters with a-z because those are Unicode characters. Character classes. Requirement: to allow only numbers, space, and special characters + ( ) . This allowed all special characters. However, if you wish to match say a newline in Regular Expressions, a special syntax is needed, specifically, a backslash (\) followed by a designated character. If you are sure about what all characters you do not want to allow, defining a character class that includes all those characters gets the job done. I'm guessing something like /[^a-zA-Z-\-\'.!@\$%\^()_+]/g. For example, if you want to check for special characters " [email protected] #$%^&*()_+{}[]:;,.<>/?-" then it can be included in the regex pattern quite easily as given below. Is it possible to specify more than one regular expression? The syntax is described in the top-level comment. Salesforce: Regex allow only Numbers and Special Character. Phone field in Salesforce by default will accept any characters with maximum of 40 characters. Hello Soumaya, I have tested the following regular expression, which would in effect allow you to have a domain purely composed of Upper case letter, numbers and special characters - you can modify if to your liking, by adding any other characters you expect to see in there: Wondering if there is a clean way to do this where you could use \W instead of spelling out every one of the allowed special characters. + - Almost the same behavior as * - the preceding character/group is matched . 6. Regex for Alphanumeric and Special characters with limit. 6. var specialCharacterSet = "[()_.-]"; var test = Regex.IsMatch("a!", specialCharacterSet); UPDATE. Prabhu Prabhu. But these are not all characters you can use in a regular expression. If you only rely on ASCII characters, you can rely on using the hex ranges on the ASCII table. Phone field in Salesforce by default will accept any characters with maximum of 40 characters. A list of some of the more frequently used special characters are shown below: * - The preceding character/group is matched 0 or more times. Here is a regex that will grab all special characters in the range of 33-47, 58-64, 91-96, 123-126 [\x21-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E] However you can think of special characters as not normal characters. There are special characters that are sued to match multiple characters, match whitespace, match digits, match letters, etc. I have a Javascript regex like this: /^[\x00-\x7F]*$/ I want to modify this regex so that it accept all capital and non-capital alphabets, all the numbers and some special characters: - , _, @, .. However, if you wish to match say a newline in Regular Expressions, a special syntax is needed, specifically, a backslash (\) followed by a designated character. If you are sure about what all characters you do not want to allow, defining a character class that includes all those characters gets the job done. This allowed all special characters. - / in phone, fax, mobile field. Separate jquery regex for alphanumeric characters, 1 uppercase and 1 lowercase, 1 special characters. So, the regex c. but have found one issue that your regular expression will not accept _(underscore) as a special . 237 1 1 gold badge 2 2 silver badges 8 8 bronze badges. 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